Are you also feeling this way? You've been playing Sister Cohabitation Life for days, but your sister still gives you the cold shoulder. You haven't triggered a single hidden event, missed all the valuable items, and feel like you're playing for nothing. Don't lose heart—this guide solves all your pain points at once. Follow it, and your sister's affection will max out instantly, unlocking all hidden elements.

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Table of Contents

1. Opening Choices Determine Success—These Must Be Known

Your initial actions directly determine whether you'll have a smooth journey or suffer from the start. These options must be burned into your memory.

1. Hug Sister Option
When your sister comes to wake you up, choose to hug her immediately without hesitation. This directly increases her desire stat, paving the way for future intimate interactions. Who wouldn't want to give her a squeeze when she's right there waking you up, right?

2. "It's Fine, Childhood" Option
This grants a random weapon and has chain reactions later, branching into two important routes.

2.1 Fine → Steak Meal → Promise: Meat Cuisine
Cook meat dishes for your sister to directly obtain the "Maiden's Smile" equipment, which has a miraculous effect on affection gains.

2.2 Fine → Totally Forgotten
Obtain the "Someday I'll Remember" state. Though it seems useless now, future versions will definitely fill this plot hole—grab it early for no loss.

3. Promise: Don't Get Hurt
This challenge is extremely difficult—30 days without injuries, requiring you to return home early via portal or wait for time to expire. Cannot use the early-return function at the map's starting point. Once broken, the count resets. Though follow-up rewards aren't implemented yet, completing this promise grants the "Anything Goes Ticket" item—absolutely worth keeping.

4. First Peeping Event
The first peep in the bathroom is a special plot event. You can only explore briefly and must leave immediately. Remember, this is a one-time event—miss it and it's gone forever. Act fast when the time comes.

2. Complete Daily Interaction Events—Secrets to Skyrocket Affection

Daily interactions are the core of raising affection. You must watch for these events every day.

1. Ahoge System
During non-bath intimate contact, you can directly pull your sister's ahoge (hair antenna). Maximum twice per session, granting "Sister's Ahoge" ingredient each time, used for future cooking. Don't waste these chances.

2. Gaming Disturbance
Disturb your sister while she's gaming to make her angry, but after comforting her, you'll randomly obtain a promise. It's a worthwhile trade—provoke first, comfort later is the essence.

3. Duck Event
On the right shore of Adventurer's Street-2 map, you can pick up a rubber duck. Using it during bath time has special effects. If you get swept there from the waterfall, another dialogue triggers—full of Easter eggs.

4. JoyStationV Console
Purchase from the cat-eared maid NPC on Adventurer's Path for 5000 gold. If you previously obtained 5000 gold behind the wooden house, you can buy it immediately. Trigger gaming sessions with your sister at home—this feature is an affection-boosting godsend.

5. Consequences of Spicy Cooking
Making spicy dishes for your sister will make her cry from the heat, triggering the "spiced" plot. Though it seems like bullying, such special events provide hidden affection bonuses—don't feel bad.

6. First Drink Delivery
Bringing drinks home the first time triggers special dialogue. If you previously destroyed the vending machine, the dialogue changes. Recommend experiencing both versions.

7. Vending Machine Respawn Mechanic
After destroying the vending machine, it repairs itself on rainy days—but prices become astronomical, especially milk. Prepare yourself mentally.

8. "Bro's Tired" Event
Around Day 4+, if you neglect your sister and sleep early, it triggers her special dialogue. Though follow-up content isn't implemented yet, this is an important affection detection checkpoint.

3. Hidden Elements in Adventure Maps—Collect All Valuable Items

Adventure maps hide tons of valuable items and hidden equipment—don't miss them.

1. 5000 Gold Hidden Location
In Adventurer's Street-1, you can directly pick up 5000 gold behind the wooden house's chimney. The axe left of the house also yields a Hardwood Stick—instant wealth at the start.

2. Hidden Shining Wells 1 & 2
Hidden Shining Well 1 is in the bottom-right forest of Adventurer's Street-1; Hidden Shining Well 2 is in the bottom-right forest of Ruins Forest-4. Both grant items—scour every inch of the map.

3. Treasure Chest 1 Location
In Abandoned Forest, follow the glowing mushrooms to the final map. The chest in the bottom-right contains the Lava Staff weapon—explosive damage early game.

4. Mine Chest
In Development Zone (Mine)-2, there's a chest along the central staircase. Don't just stare at the mine depths—the middle of the stairs is the key spot.

5. Ruins Chest Distribution
Ruins Floor 1 has white chests at the right mechanism and left exit connection, plus a red chest on the left reachable via vine edges. Don't miss any.

6. Treasure Chest 2 Location
At the cliff below the Ruins boss Mad Red Beast, use items to fly over and find a chest containing the Hanged Man's Bone Ring equipment—essential for boss battles.

7. Fall in Hole Event
Falling in the mine map triggers "Fell into Cave" discovery. Though follow-up isn't implemented yet, this is an important exploration checkpoint.

8. Connect Ruins Cave Entrance
After clearing the central rock in Ruins Forest-4 map, you can connect to the Ruins map—this is the only path into the ruins.

9. Unknown Cave
At the Ruins entrance of Ruins Forest-5, go bottom-right to find a rock to clear, revealing a tunnel with items inside. Well-hidden but decent rewards.

10. Mecha Hidden Map
In Adventurer's Path map, climb the vines right of the vending machine to find a large forest below with a hidden passage leading to a mecha. It disappears on Day 2, and discovery is required to trigger related discoveries. The time window is extremely short—you must go on Day 1.

4. Special States and Plot Triggers—Don't Miss These Iconic Scenes

These special plots and state triggers have harsh conditions but rich rewards. Save your game specifically to farm them.

1. Toilet Event
After adventuring home, search the toilet to find unknown creatures. Later, when clicking on your sister in your room, different purple heart levels trigger different toilet events. Once you select "Go" after triggering, you can never trigger it again. Recommend clicking through at low purple heart levels first to farm enough triggers.

2. "Bro, Hang in There" Event
Staying too long in the toilet for N consecutive days (starting around Day 4) makes your sister misunderstand your physical condition. Though no follow-up gameplay yet, this shows her caring about you.

3. Bathroom Slip Event
After about 7 days of bathing, shampoo runs out, and there's a chance to trigger your sister slipping in the bathroom (without peeping). This is an important CG collection point.

4. Night Raid Discovery
During your first night raid, your sister gets caught secretly gaming, triggering a one-time plot that unlocks subsequent night raid mechanics.

5. "Retreat is Best" Special Option
With affection above 2, after bathing alone and peeping at the washroom, when caught by your sister while opening the door (three options appear), don't select any—right-click your mouse for a special option. This is an exclusive perk for high-affection players.

6. Stinky State
Equipping stinky fish bones when returning home triggers the "Bro Stinks" event. You can bathe twice to remove it. If you never bathe, hidden plots may follow, but not yet implemented.

7. Seagull Gathering Event
Equip the french fries from the purple-hat NPC on Adventurer's Path. After a certain amount is stolen, more seagull buddies appear with dialogue easter eggs: "What are we doing today? Getting fries from the dandruff bro?" The meme usage is perfect.

8. First Death Reward
After your first death, eating your sister's cooking triggers a special dream and unlocks the option to ask her to cook in the future. Dying once is absolutely worth it.

5. Advanced Tips & DLC Content—Become a True Master

Want to transform from newbie to pro? You must master these advanced techniques.

1. Flash Step Katana Skill Acquisition
Equip the Hardwood Sword, find the cat-eared maid NPC on Adventurer's Path, defeat her (you can switch weapons mid-fight), and learn the Flash Step Katana skill—the strongest early-game ability.

2. Discovery System
After sharing enough discoveries with the knight, obtain the Special T-shirt (Controller T-shirt). Discoveries include: Strange Bird Roar, Beast Meat Dish, Walking Mushroom Dish, Slime Dish, Abandoned Forest 3, Destroy Ruins Connector Rock, Fall into Cave, Mecha Shun, Play Games with Sister & Rub Big White Rabbit, etc. Triggered by going home and initiating plot.

3. First Healing Gameplay
Defeat the Ruins Floor 3 boss to obtain Red Marrow Fluid. Have your sister drink it for healing. Afterwards, there's a 25% daily chance to wake her for morning interactions. Future versions will increase this rate—start building the habit now.

4. Hot Weather Trilogy
Going out on sunny days has a chance to become hot weather, causing some NPCs to hide. If your sister received the T-shirt, hot weather probability increases (not retroactive for old saves).

4.1 Hot Weather 1
Returning home early (cannot use Star Gate) triggers sister's hot weather plot.

4.2 Hot Weather 2
Triggers a branch plot when she has the T-shirt, with richer content.

4.3 Hot Weather 3
Talking to the purple-hat NPC on Adventurer's Path grants an electric fan, unlocking new options for hot weather branch plots.

5. DLC Shadow Soul Unlock
After sharing enough discoveries with the knight, obtain the DLC Shadow Soul—the ultimate current content.

6. Secret of Leftover Letter
After completing all knight-related quests, find a leftover letter. Following its hints leads to hidden content, though follow-up likely isn't implemented yet—collect it first.

Summary
The core of Sister Cohabitation Life is seizing every one-time event. Don't fear making your sister angry in daily interactions. Scour every inch of adventure maps. Save your game specifically to farm special states. Follow this guide, and you'll unlock over 90% of content in one playthrough—your sister's affection will rise faster than you imagine.